package com.yhb.channel.impl.BJCJ.http.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import javax.servlet.http.HttpServletRequest;

import me.edzh.spring.bootstrap.utils.exception.ServiceException;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSONObject;
import org.apache.log4j.Logger;

/**
 * @author 段言琪
 * @version 1.0
 * @date 2019年4月23日 下午2:21:41
 * @since jdk1.8
 */
public class BJCJHttpRequest {

    private static final Logger logger = Logger.getLogger(BJCJHttpRequest.class);
    /**
     * 向指定URL发送GET方法的请求
     *
     * @param url   发送请求的URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     *
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url   发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     *
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        //使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url   发送请求的 URL
     * @param param 请求参数json数据
     *
     * @return 所代表远程资源的响应结果
     */
    public static String sendPostJson(String url, String param) {
        int status = 0;
        String body = null;
        HttpPost method = new HttpPost(url);
        HttpClient httpClient = new DefaultHttpClient();
        if (param != null && !"".equals(param.trim())) {
            try {
                // 建立一个NameValuePair数组，用于存储欲传送的参数
                method.addHeader("Content-type", "application/json; charset=UTF-8");
                method.setHeader("Accept", "application/json");
                // method.setHeader("Content-Type","application/json; charset=UTF-8");
                StringEntity stringEntity = new StringEntity(param, "utf-8");
                stringEntity.setContentEncoding("UTF-8");
                method.setEntity(stringEntity);
                InputStream is = method.getEntity().getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8));
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = reader.readLine()) != null) {
                    sb.append(line).append("\n");
                }


                HttpResponse response = httpClient.execute(method);
                int statusCode = response.getStatusLine().getStatusCode();

                if (statusCode != HttpStatus.SC_OK) {

                    status = 1;
                }
                // Read the response body
                body = EntityUtils.toString(response.getEntity());

            } catch (IOException e) {
                // 网络错误
                status = 3;
            }

        }
        return body;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url   发送请求的 URL
     * @param param 请求参数，Json的形式。
     *
     * @return 所代表远程资源的响应结果
     */
    public static String sendPostJsons(String url, JSONObject head, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            conn.setRequestProperty("sysId", head.getString("sysId"));
            conn.setRequestProperty("sign", head.getString("sign"));
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
            logger.error("", e);
            throw new ServiceException(-23333L, "支付商接口出现错误");
        }
        //使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result.toString();
    }

    public static String getRequestJsons(HttpServletRequest request) {
        int contentLength = request.getContentLength();
        String str = "";
        if (contentLength < 0) {
            return str;
        }
        byte[] buffer = new byte[contentLength];
        try {
            for (int i = 0; i < contentLength; i++) {
                int readLen = request.getInputStream().readLine(buffer, i, contentLength - i);
                if (readLen == -1) {
                    break;
                }
                i += readLen;
            }
            str = new String(buffer, 0, contentLength, StandardCharsets.UTF_8);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return str;
    }

    public static String getJsonsString(HttpServletRequest request) {
        String str;
        StringBuilder wholeStr = new StringBuilder();
        try {
            BufferedReader br;
            br = request.getReader();
            while ((str = br.readLine()) != null) {
                wholeStr.append(str);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return wholeStr.toString();
    }
}